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    <title>Dropdown - Metro 4 :: Popular HTML, CSS and JS library</title>
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                <h5>Table of contents</h5>
                <hr/>
                <ul class="toc-nav">
                    <li class="toc-entry"><a href="#">Dropdown</a></li>
                    <li class="toc-entry"><a href="#_dropdown_about">About</a></li>
                    <li class="toc-entry"><a href="#_dropdown_options">Options</a></li>
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                <h1>Dropdown</h1>
                <p class="text-leader">
                    Easy creating dropdown elements with special role.
                </p>

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                <h3 id="_dropdown_about">About</h3>
                <p>
                    Quite often you have to create elements that <code>dropdown</code> at the user's request. For example, drop-down menus.
                    In Metro 4 you can transform any element to <code>dropdown</code>. Element must have <code>display: block</code> css property.
                    To create <code>dropdown</code> element you can add role <code>data-role="dropdown"</code> and define <code>toggle</code> for it with attribute <code>data-toggle-element="..."</code>.
                    At the same time, only one dropdown element can be opened.
                </p>
                <div class="example">
                    <button class="button" id="dropdown_toggle_1">Drop block</button>
                    <div class="pos-relative">
                        <div class="bg-red fg-white" data-role="dropdown" data-toggle-element="#dropdown_toggle_1">
                            <p class="p-10 text-center">In Metro 4 you can transform any element to dropdown.</p>
                        </div>
                    </div>
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                <pre><code class="html">
                    &lt;button class="button" id="dropdown_toggle_1"&gt;Drop block&lt;/button&gt;
                    &lt;div class="pos-relative"&gt;
                        &lt;div class="bg-red fg-white"
                                data-role="dropdown"
                                data-toggle-element="#dropdown_toggle_1"&gt;
                            &lt;p class="p-10 text-center"&gt;
                                In Metro 4 you can transform any element to dropdown.
                            &lt;/p&gt;
                        &lt;/div&gt;
                    &lt;/div&gt;
                </code></pre>

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                <h3 id="_dropdown_options">Options</h3>
                <p>
                    Each dropdown element has a number of option:
                </p>
                <table class="table cell-border table-border options-table">
                    <thead>
                    <tr>
                        <th>Option</th>
                        <th>Data-*</th>
                        <th>Default</th>
                        <th>Desc</th>
                    </tr>
                    </thead>
                    <tbody>
                    <tr>
                        <td>effect</td>
                        <td><code>data-effect</code></td>
                        <td>slide</td>
                        <td>Show/Close effect. Values: slide, fade</td>
                    </tr>
                    <tr>
                        <td>toggleElement</td>
                        <td><code>data-toggle-element</code></td>
                        <td>null</td>
                        <td>Selector who specified toggle element</td>
                    </tr>
                    <tr>
                        <td>duration</td>
                        <td><code>data-duration</code></td>
                        <td>300</td>
                        <td>Effect duration in milliseconds</td>
                    </tr>
                    <tr>
                        <td>noClose</td>
                        <td><code>data-no-close</code></td>
                        <td>false</td>
                        <td>If true, dropped element can't be close</td>
                    </tr>
                    <tr>
                        <td>onDrop</td>
                        <td><code>data-on-drop</code></td>
                        <td>Metro.noop</td>
                        <td>Event fired when element dropped</td>
                    </tr>
                    <tr>
                        <td>onUp</td>
                        <td><code>data-on-up</code></td>
                        <td>Metro.noop</td>
                        <td>Event fired when element close</td>
                    </tr>
                    <tr>
                        <td>onDropdownCreate</td>
                        <td><code>data-on-dropdown-create</code></td>
                        <td>Metro.noop</td>
                        <td>Event fired when element created</td>
                    </tr>
                    </tbody>
                </table>

                <p class="remark warning">
                    Important! One dropdown element is open, other dropdown elements are closed!
                </p>

                <h3 id="_dropdown_methods">Methods</h3>
                <p>
                    Each dropdown component has next methods: <code>open()</code>, <code>close()</code>. You can use this methods to interact with component.
                </p>
                <pre><code class="javascript">
                    el = $('#el').data('dropdown');
                    el.open();
                    setTimeout(function(){
                        el.close();
                    }, 2000);
                </code></pre>
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